The JTAG Board File

The content of a JTAG Board file is divided into various sections. The following two sections are common to all files:

• [FileVersion] – the version of the JTAG Board file

• [BoardDetails] – includes the name of the board as well as any board ID(s). The latter are currently only supported for the NanoBoard and defined in the Nanoboard.JTGBRD file.

Following these are sections that detail mapping of the supported communication chains from the parallel port to the actual routing on the board named in the [BoardDetails] section. For 3rd party boards, two sections can be declared:

• [HardChannel] – mapping for the Hard Devices JTAG chain
• [SoftChannel] – mapping for the Soft Devices JTAG chain.

Figure 1 shows an example of a JTAG Board file, in this case the file required to map the JTAG chains to a Xilinx development board – Xilinx.JTGBRD.

Figure 1. Mapping JTAG device chains to a Xilinx development board using a JTAG Board file.